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Estrogen Receptor Polymorphisms

Meaning

Estrogen receptor polymorphisms are naturally occurring variations in the DNA sequence of the genes that encode the estrogen receptor proteins (ER-alpha and ER-beta). These common genetic differences, often single nucleotide polymorphisms (SNPs), can subtly alter the structure, stability, or expression level of the receptor. Consequently, these variations dictate an individual’s unique tissue sensitivity and metabolic response to both endogenous estrogen and exogenous hormone therapies.